158 THE AMERICAN NATURALIST. | [Vor. XXXV. 
la femelle de l’Eczton cecum Latr. J'ai été trop prudent en 
n'affirmant pas tout de suite cette assimilation, mais la présence 
d'une ğ dans le tube contenant la 9 et la connaissance plus 
étendue qu'on a aujourd'hui des Dorylides ne laissent plus 
aucun doute à cet égard.” 
Professor Emery has just published a revision of the genus 
Eciton. For some time past he has recognized in the insect 
known as Labidus latreillei Jurine, and a number of other 
forms which seem to have merely varietal or synonymic value 
(Labidus sayi Hald.; L. atriceps F. Smith; L. jurined Shuck; 
L. Servillei Westwood; L. smita D. T.; L. pilosus F. M.; 
and L. fulvescens Blanch), the male of Eciton cecum. We are, 
therefore, acquainted with the three phases of the commonest 
and most widely distributed of the ecitons, a species which 
ranges from Utah and Texas to southern Brazil and has been 
very generally known in the worker phase to entomologists for 
more than a century.? 
Eciron (EciroN) cccuM LATREILLE. 
[sj ? Formica omnivora Oliv. Encycl. Method. Ins., vol. v (1791), No. 6, p. 496. 
9 Formica ceca Latr. Hist. Nat. des Fourmis, tome ix (1802), p. 270, Fig. 56. 
9 Eciton vastator Smith. Journ. Ent., vol. i (1860), p. 71. 
Q Eciton erratica Smith. Loc.cit,p.71. Bates. Natur. Amazons, vol. ii (1863), 
gj Wycteresia ceca Roger. Berl. Ent. Zeitschr. (1861), p. 22. 
[s] miii rubra Buckley. Proc. Ent. Soc. Phil. (1866), p. 335. 
$E ton omnivorum Emery. Bull. Soc. Ital, vol xxiii (1891), p. 163; ibid., 
E xxvi i (1894), p. 179, T. II, Figs. 9 a-d; Zool. Jahrb., Abth. f. Syst. 
Bd. viii (1894), p. 258. 
Q Eciton cecum Mayr. Wien. Ent. Zeitschr. (1886), p. 119; Verh. zool. bot. Ges. 
Wien., Bd. xxxvi (1886), p 
9 Peudodihthad incerta kee grues aux Fourmis (1885), p. 8, Fig. 1-5; 
en. Europ. II (1886), p. 840, fig. 
$ m ales Jurine (1807); Emery, Nuovi Studi sul Genere Eciton, Mem. - 
Accad. Sci. st. Bologna (1900), p. 9. 
1 Nuovi Studi sul Genere Eciton, Mem. letta alla R. Accad. delle Sci. dell’ 
Jstituto di Bologna, 25 marzo, 1900, 18 pp., 1 tav. 
? The remarkable sexual trimorphism of this i insect, together with its variability, 
atleastin the worker and male phases, is largely responsible for the following 
interesting synonymy compiled from the contributions of Forel and Emery. For 
her mention of the literature the reader is referred to Dalla Torre's Catalogus 
| Hymenopterorum, vol. vii, Formicide, 1893, pp. 1-7. 
